system.cc (5330:a1db38b0d8e8) system.cc (5450:25e395a87745)
1/*
1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
2 * Copyright (c) 2007-2008 The Hewlett-Packard Development Company
3 * All rights reserved.
4 *
5 * Redistribution and use of this software in source and binary forms,
6 * with or without modification, are permitted provided that the
7 * following conditions are met:
8 *
9 * The software must be used only for Non-Commercial Use which means any
10 * use which is NOT directed to receiving any direct monetary

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63#include "mem/physical.hh"
64#include "params/LinuxX86System.hh"
65
66
67using namespace LittleEndianGuest;
68using namespace X86ISA;
69
70LinuxX86System::LinuxX86System(Params *p)
3 * All rights reserved.
4 *
5 * Redistribution and use of this software in source and binary forms,
6 * with or without modification, are permitted provided that the
7 * following conditions are met:
8 *
9 * The software must be used only for Non-Commercial Use which means any
10 * use which is NOT directed to receiving any direct monetary

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63#include "mem/physical.hh"
64#include "params/LinuxX86System.hh"
65
66
67using namespace LittleEndianGuest;
68using namespace X86ISA;
69
70LinuxX86System::LinuxX86System(Params *p)
71 : X86System(p), commandLine(p->boot_osflags)
71 : X86System(p), commandLine(p->boot_osflags), e820Table(p->e820_table)
72{
73}
74
75LinuxX86System::~LinuxX86System()
76{
77}
78
79void

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139 */
140
141 // A pointer to the number of E820 entries there are.
142 const Addr e820MapNrPointer = realModeData + 0x1e8;
143
144 // A pointer to the buffer for E820 entries.
145 const Addr e820MapPointer = realModeData + 0x2d0;
146
72{
73}
74
75LinuxX86System::~LinuxX86System()
76{
77}
78
79void

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139 */
140
141 // A pointer to the number of E820 entries there are.
142 const Addr e820MapNrPointer = realModeData + 0x1e8;
143
144 // A pointer to the buffer for E820 entries.
145 const Addr e820MapPointer = realModeData + 0x2d0;
146
147 struct e820Entry
148 {
149 Addr addr;
150 Addr size;
151 uint32_t type;
152 };
147 e820Table->writeTo(physPort, e820MapNrPointer, e820MapPointer);
153
148
154 // The size is computed this way to ensure no padding sneaks in.
155 int e820EntrySize =
156 sizeof(e820Entry().addr) +
157 sizeof(e820Entry().size) +
158 sizeof(e820Entry().type);
159
160 // I'm not sure what these should actually be. On a real machine they
161 // would be generated by the BIOS, and they need to reflect the regions
162 // which are actually available/reserved. These values are copied from
163 // my development machine.
164 e820Entry e820Map[] = {
165 {ULL(0x0), ULL(0x9d400), 1},
166 {ULL(0x9d400), ULL(0xa0000) - ULL(0x9d400), 2},
167 {ULL(0xe8000), ULL(0x100000) - ULL(0xe8000), 2},
168 {ULL(0x100000), ULL(0xcfff9300) - ULL(0x100000), 1},
169 {ULL(0xcfff9300), ULL(0xd0000000) - ULL(0xcfff9300), 2},
170 {ULL(0xfec00000), ULL(0x100000000) - ULL(0xfec00000), 2}
171 };
172
173 uint8_t e820Nr = sizeof(e820Map) / sizeof(e820Entry);
174
175 // Make sure the number of entries isn't bigger than what the kernel
176 // would be capable of providing.
177 assert(e820Nr <= 128);
178
179 uint8_t guestE820Nr = X86ISA::htog(e820Nr);
180 physPort->writeBlob(e820MapNrPointer,
181 (uint8_t *)&guestE820Nr, sizeof(guestE820Nr));
182
183 for (int i = 0; i < e820Nr; i++) {
184 e820Entry guestE820Entry;
185 guestE820Entry.addr = X86ISA::htog(e820Map[i].addr);
186 guestE820Entry.size = X86ISA::htog(e820Map[i].size);
187 guestE820Entry.type = X86ISA::htog(e820Map[i].type);
188 physPort->writeBlob(e820MapPointer + e820EntrySize * i,
189 (uint8_t *)&guestE820Entry.addr,
190 sizeof(guestE820Entry.addr));
191 physPort->writeBlob(
192 e820MapPointer + e820EntrySize * i +
193 sizeof(guestE820Entry.addr),
194 (uint8_t *)&guestE820Entry.size,
195 sizeof(guestE820Entry.size));
196 physPort->writeBlob(
197 e820MapPointer + e820EntrySize * i +
198 sizeof(guestE820Entry.addr) +
199 sizeof(guestE820Entry.size),
200 (uint8_t *)&guestE820Entry.type,
201 sizeof(guestE820Entry.type));
202 }
203
204 /*
205 * Pass the location of the real mode data structure to the kernel
206 * using register %esi. We'll use %rsi which should be equivalent.
207 */
208 threadContexts[0]->setIntReg(INTREG_RSI, realModeData);
209}
210
211LinuxX86System *
212LinuxX86SystemParams::create()
213{
214 return new LinuxX86System(this);
215}
149 /*
150 * Pass the location of the real mode data structure to the kernel
151 * using register %esi. We'll use %rsi which should be equivalent.
152 */
153 threadContexts[0]->setIntReg(INTREG_RSI, realModeData);
154}
155
156LinuxX86System *
157LinuxX86SystemParams::create()
158{
159 return new LinuxX86System(this);
160}